<form method="post" >
    <input type="radio" name="addComp" value=""  onclick="enableCompanions();"/> Add Companions&nbsp;&nbsp;&nbsp;
    <label> Num of Companions:</label>
    <select id="noOfComp" name="noOfComp" disabled="disabled">
          <option value="1">1</option>
          <option value="2">2</option>
          <option value="3">3</option>
          <option value="4">4</option>
    </select>
    <br />
    <input type="radio" name="addComp" value="true" onclick="disableCompanions();" /> No Thanks
    <br/>
    <input type="submit" value="Confirm">
</form>
